Question

The first, third and fourth terms of a proportion are 7, 28 and 68 respectively. Find
the second term.

Answer 1

Answer:

17

Step-by-step explanation:

let's make the propotion

let's consider the second term as x

• 7 : x :: 28 : 68

so the term x and 28 is known as : mean

and the term 7 and 68 is known as : extreme

so the formula is :

product of extreme = product of mean

7×68 = x × 28

476. =. x×28

476 / 28 =. x

17 = x

so the second term is 17